Kubernetes Submit Queue c21fdc71a3 Merge pull request #32986 from Random-Liu/add-image-white-list ...

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Node E2E: Add image white list

This is part of #29081. Fixes #29155.

As is discussed with @yujuhong in #29155, it is difficult to maintain the prepull image list if it is not enforced. 

This PR added an image white list in the test framework, only images in the white list could be used in the test. If the image is not in the white list, the test will fail with reason:
```
Image "XXX" is not in the white list, consider adding it to CommonImageWhiteList in test/e2e/common/util.go or NodeImageWhiteList in test/e2e_node/image_list.go
```

Notice that if image pull policy is `PullAlways`, the image is not necessary to be in the white list or prepulled, because the test expects the image to be pulled during the test.

Currently, the image white list is only enabled in node e2e, because the image puller in e2e test is not integrated with the image white list yet.

/cc @kubernetes/sig-node

2016-09-20 07:28:58 -07:00

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